CHICAGO (CBS) — The Chicago Public Schools are constantly being scrutinized for improving test scores and academic standards.

But who’s watching to make sure the school’s kitchens and lunchrooms are being kept up to safety standards?

Since 2011, 244 of Chicago’s 681 schools failed at least one inspection, according to a review of city health department inspections by the 2 Investigators. That’s 35 percent with at least one failed inspection.

The Anton Dvorak Elementary School had the worst record. Since 2011, Dvorak has failed city health inspections six times for reasons such as no hot water in bathroom sinks, food kept at unsafe temperatures and more than 200 rodent droppings found in food service areas.